Switch.



PATENTED DEC. 31, 1907, 0. N. BERGMANN.

SWITCH.

APPLICATION FILED MAY 4, 1905.

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. UNITED STATES PAEN'E enr ch.

CHRISTIAN N. BEneMnNN, orALLEenENYfiinNNsYLvAnm.

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Specification of Letters Patent. I

' Fatented Dec. 31, 1907.

Application filed May 4, 1905. Serial No. 25834.9.

, mg drawing, forming part ofthe specificabig round bars.

tion, in .which Figure 1. IS a perspective view of a portion of my nnproved switch blade, illustrating the manner of attaching the, blade to the insulating handle bar. Fig. 2. is an edge View of thedevice. Fig. 3. is a plan view of Fig. 2. Fig. 4. is a similar view showing a modified construction. Fig. 5. is a perspective detail view of one end of the blade, detached. Fig. 6. is adetail view of one of the holding clips detached. Fig. 7. is a similar view showing a clip havinga-p urality of holes at each end. Fig. 8. is a perspective detail view showing a double attachment, employ- Fig. 9. is a sectional view ot the construction shown in Fig. 8. Fig. 10. is a horizontal sectional View on the line X. X. ot'Fig. 9. Figs. 11 and 12 are detail views showing further modifications.

My invention refers to improvements in electricswitches and has for its object to provide a strong, simple, economical connec- 'tion between the insulating handle bar-or yoke and the switch blade so as to prevent relative movement of these partsand to hold them in continuous rigid operative relation to each other under the varyin strains and operations to which devices of his character are subjectin use.

Referring to the drawings, 2 represents the usual blade or blades of an electric switch pivotally mounted in a standard or standards 3 in electrical ,communication with the terminal or terminals of the circuit, and adapted to close the circuit with another 'eontacting terminal, between the side plates of which the blade or blades 2 are adapted to engage in the usual manner.

t represents the. insulating cross bar or yoke to which the blades are secured, said bar being provided with an operating han; die 5 of any suitable construction.

The present invention refers particularly to the means for connecting the blade 2 with insulating bare, and for this purpose 1 pref erably recess or rabbct the bar 4 as shown at 6, into which recess the blade 2 partially extends, the blade being provide'd with one or more crpss perforations- 7 adapted to receive a securing clip 8 .which extends outwardly at each side of the blade as shown, ceive other securing means.

or to re- 9, 9, are threaded screws or bolts extend- I 'ing through the insulating bar 4 from the opposite side and extending throughthe l terminals of clip 8, by which the bladeZ may be tightly drawn up .against .bar 4. The clips 8 may be internally threaded andtapped into by the bolts then'iselves, or may be merely drilled in which case the bolts are provided with binding nuts 10 as shown in Fig. 4. With a narrow blade a single clip 8 is sutlicient, and in such construction-the clip is preferably made rectangular, fitting into a corresponding rectangular hole 7-, thus increasing movement. It will be also; obvious-that a, single clip may be used for holdin'gtwo-or more blades'by connecting the holding bolt with the clip between the blades. I Y

the holding power and preventing In Figs. 8 to 10 inclusive l-have shown the to blade 2 as provided with a plurality ofholding clips 8. which are made in cylindrical form as shown above and below, iitendmg through corresponding -.yhndr1cal openings 7 in the end of theblade and heldin osition v by securing screws 9 tapped into tie belts in the same manner as just described. will be understood that the number of clips may be varied to suit different widths of the blade, and that the clips'inay be made of any suitable construction in cross section, either" oblong, round or square. If desired also, the clips Sniay be made suiiiclentlywide to provide space for two or more screw holes at each end, there-by furtherstrengthening the joint, as in Fig. 7. In each case however, the effect is the same to hold the blade in immovable fixed relation with the insulating bar 4, the rabbeted engagement preventing lateral movement while thescrews engaging the clips positively hold it against up or down shifting.

In Fig. 11 1 show a single L shapedboltll engaging the opening 7 in the blade,'and in Fig. 12 a U-shapcd bolt 12 having tightening nuts at each side, in each of which obvious construct-ions the blade will be held tightly against the insulating bar. Having described my invention, what I claim is: i

1. ina joint for switch blades, the combination with a holding bar, of a blade'proa bar consisting of a transverse clip extend- ,ing through the blade, and screws engaging the clip at each side of the bladeand securing it thereto, substantially as set forth.

3. A connection for switch blades consisting of a transverse clip extending through and beyond the blade and provided with terminal openings, and means adapted to engage said openings and clampsaid clip,

bar, substantially as set forth.

4. A connection-for switch blades consisting of a transverse clip extending through and beyond the blade and provided with terminal openings, and means adapted to engage said openings and 'clamp said clip and the blade backwardly against a holding bar, said bar being recessed to receive the end of the blade, substantially as set forth.

5. In a joint for switch blades, the combination with an insulating bar provided with a recess, of a blade extending directly into said recess, a clip extending through and beyond the blade, and securing screws tapped into the terminals of the clip, substantially as set forth.

6. The combination with an insulatingbar provided with a receiving recess, of-a switch and the blade backwardly against a holding blade provided with a transverse opening, a

holding clip extending through said opening and projecting outwardly at each side of the blade, with securing screws extending through from the opposite side of the insulator bar and tapped into the opposite-ends of said clip, substantially as set forth.

7. Means for connecting a switch blade I having a continuously solid bearing end to a bar, consistin of a transverse clip extending through and eyond the blade, and a bolt engaging the clip at one side of the blade and adapted to draw it and the blade backwardly against the bar.

8. The combination with an insulating bar, of a switch blade having a transverse opening, a holding clip engaging said opening and projecting laterally beyond the blade, and a securing bolt passing through the insulating bar and engaging the projecting portion of the clip.

9. Means for connecting a switch blade to a bar consisting of a transverse cli passing through and extending beyond tl ie blade,

' and a bolt engaging the bar and the extended. portion of the clip to draw it and the blade backwardly against the bar.

10. In a joint for switch blades, the combination with an insulating bar provided with a rectangular recess, of a blade having a rectangular end extending directly into serted in the transverse opening of the blade. V 11. The combination with an insulating bar, of a switch blade having a transverse opening a holding clip engaging said opening and projecting laterally beyond the blade, and asecuring bolt passing through i the insulating'bar and engaging the clip at.

one side of the blade.

CHAS. STLEPLEY, O. M. CLARKE;

In testimony whereof I affix my signature 

